Learning Objectives

Your understandings and resources

1.        Describe a model of the atom that accounts for the fact that neural particles can become either positively or negatively charged.

Cite experimental evidence from J.J. Thomson’s experiments that supported his atomic model.

2.        Apply the above atomic model to explain the observed interactions between the tapes, foil and paper in the Sticky Tape Lab.  

        Identify the key property that distinguishes metals from nonmetals.  Apply the atomic model to account for the difference in this property.

        Explain the term polarization.

Apply the same atomic model to explain observations such as a balloon being attracted to the wall after rubbing against hair.

3. Cite evidence that distinguishes ionic from molecular compounds.  Give specific examples.

4.        Cite evidence for (+) charged metal ions and (-) charged nonmetal ions.  Give atomic level explanations.

5.        Differentiate atomic, molecular and ionic solids by their lattice structures.  Relate the structures to their properties such as melting and boiling points.

Classify a given unit cell of an elemental solid or an ionic solids into one of the three cubic unit cells.


Describe similarities and differences between an ionic solid and a molecular solid.


Determine whether a compound is ionic or molecular from the elements that make up the compound.

6.        Draw particle diagrams for ions and formula units for ionic compounds;

Count number of atoms and number of ions in a formula unit.

7.        Given the formula of an ionic or molecular substance, state its name.

8.        Given the name of ionic or molecular substance, write its formula.